Sismoestratigrafia do cretÃceo superior/ neÃgeno nas bacias de Pernambuco e da ParaÃba, NE do Brasil

AUTOR(ES)
DATA DE PUBLICAÇÃO

2008

RESUMO

This work presents the mapping of seismic sequences from the albian portion of the offshore basins of Pernambuco and Paraiba embasado in individualizaÃÃes of fÃcies and interpretation of seismic maps of isÃcronas. In Basin of Pernambuco were mapped four disagreements and four sequences (A, B, C, D), the basin of Paraiba has three disagreements, a surface of Maximum Flood (SIM) and three sequences (B1, C1, D1). The sequence A is composed of three fÃcies, correlated to the proximal portion of the training Securing onshore, the median is composed of margas and distal by folhelhos. The sequence B is characterized by sandstone probably plataformais Training Algodoais by carbonates of the interface and platform-slope folhelhos Training Calumbi deep in the basin. The basin has a pipeline of Pernambuco erosive, whose emergence can be correlated with the event occurred during Turoniano to Santonian continents in Africa and South America. The sequence B1 finds are three sismofÃcies in the region can plataformal correlates with the Beberibe formations, and Itamaracà Gramame, which occur in onshore and a SIM maastrichtiana of age, the slope is an area of sediment bypass, the plain abissal is represented by pelitos. The sequence C, the region is characterized by plataformal standard termination downlaps representing the sands in the slope deposits is the carbonates in the distal region Training Calumbi, with some wolves turbidÃticos. The sequence C1 ramp is the deposition of carbonates regressive Training Maria meal, in the plains abissal slope and the characteristics are the same sequence of B1. The sequence D composed sediments clÃsticos that can be correlated Training Barriers, at the foot of the slope deposit up systems arrays through gravitational flow of the type escorregamentos, turbidity currents, and rastejamento in the region bacial deposited the folhelhos Training Calumbi. Following the D1 platform is represented by the Training Barriers, the slope is correlated to an area of sediment bypass, in plain abissal are deposited sediments foothills of the slope, in a few lines there is record of sediment deposition in deep water. The maps of sequences show that the basin of Paraiba no record of sedimentation of age cenomaniana-turoniana because the rifte existing in the basin of Pernambuco was aborted in the vicinity of the island of ItamaracÃ, and showed the existence of some structures as: the high the Maracatu, the internal Basin, the top of ItamaracÃ, the contour of Platà of Pernambuco and erosive pipeline

ASSUNTO(S)

seqÃÃncia sÃsmica calha erosiva seismic sequence albian bacia da paraÃba geociencias erosive pipeline bacia de pernambuco albiano basin of pernambuco basin of paraÃba

ACESSO AO ARTIGO

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